src/dolphincolumnview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz (peter.penz@gmx.at)                  *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "dolphincolumnview.h"
  21
  22 #include "dolphincontroller.h"
  23 #include "dolphinsettings.h"
  24
  25 #include "dolphin_columnmodesettings.h"
  26
  27 #include <kcolorutils.h>
  28 #include <kcolorscheme.h>
  29 #include <kdirmodel.h>
  30 #include <kdirlister.h>
  31 #include <kfileitem.h>
  32
  33 #include <QAbstractProxyModel>
  34 #include <QPoint>
  35
  36 /**
  37  * Represents one column inside the DolphinColumnView and has been
  38  * extended to respect view options and hovering information.
  39  */
  40 class ColumnWidget : public QListView
  41 {
  42 public:
  43     ColumnWidget(QWidget* parent,
  44                  DolphinColumnView* columnView,
  45                  const KUrl& url);
  46     virtual ~ColumnWidget();
  47
  48     /** Sets the size of the icons. */
  49     void setDecorationSize(const QSize& size);
  50
  51     /**
  52      * An active column is defined as column, which shows the same URL
  53      * as indicated by the URL navigator. The active column is usually
  54      * drawn in a lighter color. All operations are applied to this column.
  55      */
  56     void setActive(bool active);
  57
  58     inline const KUrl& url() const;
  59
  60 protected:
  61     virtual QStyleOptionViewItem viewOptions() const;
  62     virtual void dragEnterEvent(QDragEnterEvent* event);
  63     virtual void dragLeaveEvent(QDragLeaveEvent* event);
  64     virtual void dragMoveEvent(QDragMoveEvent* event);
  65     virtual void dropEvent(QDropEvent* event);
  66     virtual void mousePressEvent(QMouseEvent* event);
  67     virtual void paintEvent(QPaintEvent* event);
  68     virtual void contextMenuEvent(QContextMenuEvent* event);
  69
  70 private:
  71     /** Used by ColumnWidget::setActive(). */
  72     void activate();
  73
  74     /** Used by ColumnWidget::setActive(). */
  75     void deactivate();
  76
  77 private:
  78     bool m_active;
  79     KUrl m_url;
  80     DolphinColumnView* m_view;
  81     QStyleOptionViewItem m_viewOptions;
  82
  83     bool m_dragging;   // TODO: remove this property when the issue #160611 is solved in Qt 4.4
  84     QRect m_dropRect;  // TODO: remove this property when the issue #160611 is solved in Qt 4.4
  85 };
  86
  87 ColumnWidget::ColumnWidget(QWidget* parent,
  88                            DolphinColumnView* columnView,
  89                            const KUrl& url) :
  90     QListView(parent),
  91     m_active(true),
  92     m_url(url),
  93     m_view(columnView),
  94     m_dragging(false),
  95     m_dropRect()
  96 {
  97     setAcceptDrops(true);
  98     setDragDropMode(QAbstractItemView::DragDrop);
  99     setDropIndicatorShown(false);
 100
 101     setMouseTracking(true);
 102     viewport()->setAttribute(Qt::WA_Hover);
 103
 104     // apply the column mode settings to the widget
 105     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 106     Q_ASSERT(settings != 0);
 107
 108     m_viewOptions = QListView::viewOptions();
 109
 110     QFont font(settings->fontFamily(), settings->fontSize());
 111     font.setItalic(settings->italicFont());
 112     font.setBold(settings->boldFont());
 113     m_viewOptions.font = font;
 114
 115     const int iconSize = settings->iconSize();
 116     m_viewOptions.decorationSize = QSize(iconSize, iconSize);
 117
 118     activate();
 119 }
 120
 121 ColumnWidget::~ColumnWidget()
 122 {
 123 }
 124
 125 void ColumnWidget::setDecorationSize(const QSize& size)
 126 {
 127     m_viewOptions.decorationSize = size;
 128     doItemsLayout();
 129 }
 130
 131 void ColumnWidget::setActive(bool active)
 132 {
 133     if (m_active == active) {
 134         return;
 135     }
 136
 137     m_active = active;
 138
 139     if (active) {
 140         activate();
 141     } else {
 142         deactivate();
 143     }
 144 }
 145
 146 const KUrl& ColumnWidget::url() const
 147 {
 148     return m_url;
 149 }
 150
 151 QStyleOptionViewItem ColumnWidget::viewOptions() const
 152 {
 153     return m_viewOptions;
 154 }
 155
 156 void ColumnWidget::dragEnterEvent(QDragEnterEvent* event)
 157 {
 158     if (event->mimeData()->hasUrls()) {
 159         event->acceptProposedAction();
 160     }
 161
 162     m_dragging = true;
 163 }
 164
 165 void ColumnWidget::dragLeaveEvent(QDragLeaveEvent* event)
 166 {
 167     QListView::dragLeaveEvent(event);
 168
 169     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 170     m_dragging = false;
 171     setDirtyRegion(m_dropRect);
 172 }
 173
 174 void ColumnWidget::dragMoveEvent(QDragMoveEvent* event)
 175 {
 176     QListView::dragMoveEvent(event);
 177
 178    // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 179     const QModelIndex index = indexAt(event->pos());
 180     setDirtyRegion(m_dropRect);
 181     m_dropRect = visualRect(index);
 182     setDirtyRegion(m_dropRect);
 183 }
 184
 185 void ColumnWidget::dropEvent(QDropEvent* event)
 186 {
 187     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 188     if (!urls.isEmpty()) {
 189         event->acceptProposedAction();
 190         m_view->m_controller->indicateDroppedUrls(urls,
 191                                                         indexAt(event->pos()),
 192                                                         event->source());
 193     }
 194     QListView::dropEvent(event);
 195     m_dragging = false;
 196 }
 197
 198 void ColumnWidget::mousePressEvent(QMouseEvent* event)
 199 {
 200     if (m_active || indexAt(event->pos()).isValid()) {
 201         // Only accept the mouse press event in inactive views,
 202         // if a click is done on an item. This assures that
 203         // the current selection, which usually shows the
 204         // the directory for next column, won't get deleted.
 205         QListView::mousePressEvent(event);
 206     }
 207 }
 208
 209 void ColumnWidget::paintEvent(QPaintEvent* event)
 210 {
 211     QListView::paintEvent(event);
 212
 213     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 214     if (m_dragging) {
 215         const QBrush& brush = m_viewOptions.palette.brush(QPalette::Normal, QPalette::Highlight);
 216         DolphinController::drawHoverIndication(viewport(), m_dropRect, brush);
 217     }
 218 }
 219
 220 void ColumnWidget::contextMenuEvent(QContextMenuEvent* event)
 221 {
 222     if (m_view->viewport()->children().first() == this) {
 223         // This column widget represents the root column. DolphinColumnView::createColumn()
 224         // cannot retrieve the correct URL at this stage, as the directory lister will be
 225         // started after the model has been assigned. This will be fixed here, where it is
 226         // assured that the directory lister has been started already.
 227         const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(model());
 228         const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
 229         const KDirLister* dirLister = dirModel->dirLister();
 230         m_url = dirLister->url();
 231     }
 232
 233     QListView::contextMenuEvent(event);
 234
 235     const QModelIndex index = indexAt(event->pos());
 236     const KUrl& navigatorUrl = m_view->m_controller->url();
 237     if (index.isValid() || (m_url == navigatorUrl)) {
 238         // Only open a context menu above an item or if the mouse is above
 239         // the active column.
 240         const QPoint pos = m_view->viewport()->mapFromGlobal(event->globalPos());
 241         m_view->m_controller->triggerContextMenuRequest(pos);
 242     }
 243 }
 244
 245 void ColumnWidget::activate()
 246 {
 247     const QColor bgColor = KColorScheme(KColorScheme::View).background();
 248     QPalette palette = viewport()->palette();
 249     palette.setColor(viewport()->backgroundRole(), bgColor);
 250     viewport()->setPalette(palette);
 251
 252     setSelectionMode(MultiSelection);
 253 }
 254
 255 void ColumnWidget::deactivate()
 256 {
 257     QColor bgColor = KColorScheme(KColorScheme::View).background();
 258     const QColor fgColor = KColorScheme(KColorScheme::View).foreground();
 259     bgColor = KColorUtils::mix(bgColor, fgColor, 0.04);
 260
 261     QPalette palette = viewport()->palette();
 262     palette.setColor(viewport()->backgroundRole(), bgColor);
 263     viewport()->setPalette(palette);
 264
 265     setSelectionMode(SingleSelection);
 266 }
 267
 268 // ---
 269
 270 DolphinColumnView::DolphinColumnView(QWidget* parent, DolphinController* controller) :
 271     QColumnView(parent),
 272     m_controller(controller)
 273 {
 274     Q_ASSERT(controller != 0);
 275
 276     setAcceptDrops(true);
 277     setSelectionBehavior(SelectItems);
 278     setDragDropMode(QAbstractItemView::DragDrop);
 279     setDropIndicatorShown(false);
 280
 281     if (KGlobalSettings::singleClick()) {
 282         connect(this, SIGNAL(clicked(const QModelIndex&)),
 283                 this, SLOT(triggerItem(const QModelIndex&)));
 284     } else {
 285         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 286                 this, SLOT(triggerItem(const QModelIndex&)));
 287     }
 288     connect(this, SIGNAL(activated(const QModelIndex&)),
 289             this, SLOT(triggerItem(const QModelIndex&)));
 290     connect(this, SIGNAL(entered(const QModelIndex&)),
 291             controller, SLOT(emitItemEntered(const QModelIndex&)));
 292     connect(this, SIGNAL(viewportEntered()),
 293             controller, SLOT(emitViewportEntered()));
 294     connect(controller, SIGNAL(zoomIn()),
 295             this, SLOT(zoomIn()));
 296     connect(controller, SIGNAL(zoomOut()),
 297             this, SLOT(zoomOut()));
 298
 299     updateDecorationSize();
 300 }
 301
 302 DolphinColumnView::~DolphinColumnView()
 303 {
 304 }
 305
 306 QAbstractItemView* DolphinColumnView::createColumn(const QModelIndex& index)
 307 {
 308     // To be able to visually indicate whether a column is active (which means
 309     // that it represents the content of the URL navigator), the column
 310     // must remember its URL.
 311     const QAbstractProxyModel* proxyModel = static_cast<const QAbstractProxyModel*>(model());
 312     const KDirModel* dirModel = static_cast<const KDirModel*>(proxyModel->sourceModel());
 313
 314     const QModelIndex dirModelIndex = proxyModel->mapToSource(index);
 315     KFileItem* fileItem = dirModel->itemForIndex(dirModelIndex);
 316
 317     KUrl columnUrl;
 318     if (fileItem != 0) {
 319         columnUrl = fileItem->url();
 320     }
 321
 322     ColumnWidget* view = new ColumnWidget(viewport(),
 323                                           this,
 324                                           columnUrl);
 325
 326     // The following code has been copied 1:1 from QColumnView::createColumn().
 327     // Copyright (C) 1992-2007 Trolltech ASA. In Qt 4.4 the new method
 328     // QColumnView::initializeColumn() will be available for this.
 329
 330     view->setFrameShape(QFrame::NoFrame);
 331     view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
 332     view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
 333     view->setMinimumWidth(100);
 334     view->setAttribute(Qt::WA_MacShowFocusRect, false);
 335
 336     // copy the 'view' behavior
 337     view->setDragDropMode(dragDropMode());
 338     view->setDragDropOverwriteMode(dragDropOverwriteMode());
 339     view->setDropIndicatorShown(showDropIndicator());
 340     view->setAlternatingRowColors(alternatingRowColors());
 341     view->setAutoScroll(hasAutoScroll());
 342     view->setEditTriggers(editTriggers());
 343     view->setHorizontalScrollMode(horizontalScrollMode());
 344     view->setIconSize(iconSize());
 345     view->setSelectionBehavior(selectionBehavior());
 346     view->setSelectionMode(selectionMode());
 347     view->setTabKeyNavigation(tabKeyNavigation());
 348     view->setTextElideMode(textElideMode());
 349     view->setVerticalScrollMode(verticalScrollMode());
 350
 351     view->setModel(model());
 352
 353     // set the delegate to be the columnview delegate
 354     QAbstractItemDelegate* delegate = view->itemDelegate();
 355     view->setItemDelegate(itemDelegate());
 356     delete delegate;
 357
 358     view->setRootIndex(index);
 359
 360     if (model()->canFetchMore(index)) {
 361         model()->fetchMore(index);
 362     }
 363
 364     return view;
 365 }
 366
 367 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 368 {
 369     m_controller->triggerActivation();
 370     QColumnView::mousePressEvent(event);
 371 }
 372
 373 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 374 {
 375     if (event->mimeData()->hasUrls()) {
 376         event->acceptProposedAction();
 377     }
 378 }
 379
 380 void DolphinColumnView::dropEvent(QDropEvent* event)
 381 {
 382     const KUrl::List urls = KUrl::List::fromMimeData(event->mimeData());
 383     if (!urls.isEmpty()) {
 384         m_controller->indicateDroppedUrls(urls,
 385                                           indexAt(event->pos()),
 386                                           event->source());
 387         event->acceptProposedAction();
 388     }
 389     QColumnView::dropEvent(event);
 390 }
 391
 392 void DolphinColumnView::zoomIn()
 393 {
 394     if (isZoomInPossible()) {
 395         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 396         // TODO: get rid of K3Icon sizes
 397         switch (settings->iconSize()) {
 398         case K3Icon::SizeSmall:  settings->setIconSize(K3Icon::SizeMedium); break;
 399         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeLarge); break;
 400         default: Q_ASSERT(false); break;
 401         }
 402         updateDecorationSize();
 403     }
 404 }
 405
 406 void DolphinColumnView::zoomOut()
 407 {
 408     if (isZoomOutPossible()) {
 409         ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 410         // TODO: get rid of K3Icon sizes
 411         switch (settings->iconSize()) {
 412         case K3Icon::SizeLarge:  settings->setIconSize(K3Icon::SizeMedium); break;
 413         case K3Icon::SizeMedium: settings->setIconSize(K3Icon::SizeSmall); break;
 414         default: Q_ASSERT(false); break;
 415         }
 416         updateDecorationSize();
 417     }
 418 }
 419
 420 void DolphinColumnView::triggerItem(const QModelIndex& index)
 421 {
 422     m_controller->triggerItem(index);
 423
 424     // Update the activation state of all columns. Only the column
 425     // which represents the URL of the URL navigator is marked as active.
 426     const KUrl& navigatorUrl = m_controller->url();
 427     foreach (QObject* object, viewport()->children()) {
 428         if (object->inherits("QListView")) {
 429             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 430             widget->setActive(navigatorUrl == widget->url());
 431         }
 432     }
 433 }
 434
 435 bool DolphinColumnView::isZoomInPossible() const
 436 {
 437     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 438     return settings->iconSize() < K3Icon::SizeLarge;
 439 }
 440
 441 bool DolphinColumnView::isZoomOutPossible() const
 442 {
 443     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 444     return settings->iconSize() > K3Icon::SizeSmall;
 445 }
 446
 447 void DolphinColumnView::updateDecorationSize()
 448 {
 449     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 450     const int iconSize = settings->iconSize();
 451
 452     foreach (QObject* object, viewport()->children()) {
 453         if (object->inherits("QListView")) {
 454             ColumnWidget* widget = static_cast<ColumnWidget*>(object);
 455             widget->setDecorationSize(QSize(iconSize, iconSize));
 456         }
 457     }
 458
 459     m_controller->setZoomInPossible(isZoomInPossible());
 460     m_controller->setZoomOutPossible(isZoomOutPossible());
 461
 462     doItemsLayout();
 463 }
 464
 465 #include "dolphincolumnview.moc"